Stable device for conveying filter rods in prismatic slot of filter rod making machine

Abstract

The application discloses a kind of prismatic slot filter rod transmission stabilizing device of filter rod forming machine, belong to tobacco machinery technical field, to solve the problems of existing filter rod forming machine brush type stabilizing device, bristle is prone to deformation and wear, constraint rectification capacity attenuates fast, gap adjustment precision is difficult to control, frequent shutdown maintenance replacement is needed, prone to filter rod conveying instability and equipment failure shutdown.The device includes seat, hinge shaft, connecting plate, pressing plate, adjusting screw, compression spring, locking screw and handle, seat is fixed above prismatic slot, connecting plate is hinged to seat by hinge shaft to realize opening and closing, pressing plate is arranged in parallel above filter rod slot, limiting column on pressing plate cooperates with the guide through hole of connecting plate to realize anti-loose guide, the limiting gap of pressing plate is adjusted by adjusting screw, compression spring is sleeved on the outside of limiting column to provide pre-tightening buffer and anti-loose force, locking screw adjusts and locks the parallelism of pressing plate.The present application is fully compatible with the original machine installation interface and control logic, with adjustable rigid limit instead of traditional flexible brush, completely solves the series of pain points of brush easy to wear, greatly reduces the operation and maintenance cost of equipment, significantly improves the effective operation rate of filter rod forming machine and the stability of filter rod production quality.

Description

Technical Field

[0001] This invention relates to the field of tobacco machinery equipment, and specifically to a device for stabilizing the transmission of prism groove filter rods in a filter rod forming machine. Background Technology

[0002] The filter rod forming machine is a core piece of equipment in the tobacco industry's filter rod production process. In this process, the filter rods, after being cut to a fixed length by a cutting head, need to be axially conveyed through a prismatic groove (prismatic rail) and finally precisely fed into the accelerating wheel for the next process. To prevent the filter rods from jumping up and down, shifting horizontally, or becoming unstable during high-speed conveying within the prismatic groove, and to accommodate start-up slippage and the lateral rejection of defective filter rods, the filter rod forming machine is originally designed with a brush-type filter rod conveying stabilizing device installed above the prismatic groove.

[0003] The original brush device consists of a base and multiple sets of bristles. The base is made of wood or plastic. Several bristles are arranged in a cylindrical shape and divided into three rows. The middle row of bristles is shorter than the two sides, forming an arc groove that matches the shape of the filter rod. The design gap between the bristles and the filter rod in the prismatic groove is 0.1~0.2mm. The filter rod is conveyed and limited by the flexible constraint of the bristles. Unqualified filter rods can be removed laterally by pushing the bristles open with high-pressure airflow.

[0004] The existing technology has the following core flaws:

[0005] (1) The core components of the brush are easily worn out and the constraint ability decays quickly: In order to ensure the appearance quality of the filter rod, the bristles of the brush are made of soft material. Under the dual effects of continuous friction during high-speed conveying of the filter rod and repeated bending during the rejection of unqualified filter rods, the bristles are prone to deformation and uneven wear. This leads to a rapid decrease in the constraint and correction ability of the bristles on the filter rod, which cannot ensure the stable conveying of the filter rod. Ultimately, this causes the filter rod to jump and fail to enter the acceleration wheel normally, resulting in equipment failure and shutdown.

[0006] (2) Difficult to adjust and difficult to control precision: The wear of the brush bristles is uneven, and the processing dimensions of the base and the bristles are large. Operators cannot accurately control the gap between the bristles and the filter rod, which easily leads to problems such as "the gap is too small and scratches the filter rod, and the gap is too large and the limit fails". Frequent machine stops are required for adjustment, which seriously affects the operating efficiency of the equipment.

[0007] (3) High maintenance costs and low effective operating rate: Brushes are high-frequency replacement vulnerable parts, which need to be frequently adjusted or replaced as a whole according to the wear condition, which increases the cost of spare parts procurement and labor maintenance. At the same time, frequent shutdowns for adjustment greatly reduce the effective operating rate of the equipment. Summary of the Invention

[0008] To address the shortcomings of existing brush-type filter rod conveying stabilization devices used in the prismatic grooves of filter rod forming machines, such as easy deformation and wear of the bristles, rapid attenuation of constraint and correction capabilities, difficulty in controlling gap adjustment accuracy, frequent downtime for maintenance and replacement, and susceptibility to filter rod conveying instability and equipment failure, this invention provides a prismatic groove filter rod conveying stabilization device for filter rod forming machines. This device replaces the traditional flexible brush limiting structure with a hinged, adjustable rigid pressure plate structure. While fully adapting to the original machine installation interface and filter rod conveying and rejection control logic, it achieves long-term stable and precise limiting of the filter rod conveying posture. This fundamentally solves the series of problems caused by the easy wear and tear of the brushes, significantly reduces equipment maintenance costs, and significantly improves the effective operating rate of the filter rod forming machine and the stability of filter rod production quality.

[0009] The technical solution adopted by this invention to solve its technical problem is as follows: A filter rod conveying stabilizing device for a prism groove filter rod forming machine includes a seat fixed above the prism groove of the filter rod forming machine, and also includes a hinge shaft, a connecting plate, a pressure plate, an adjusting screw, a compression spring, a set screw and a handle; The rear end of the connecting plate is hinged to the seat via the hinge shaft, and the connecting plate can rotate and open around the axis of the hinge shaft. The pressure plate is arranged parallel to the filter rod groove above the prism groove. The lower surface of the pressure plate is a limiting working surface that cooperates with the filter rod. The filter rod inlet end of the pressure plate is machined with a guide angle that tilts upward toward the filter rod. The upper surface of the pressure plate is provided with a limiting post, and the connecting plate is provided with a guide through hole that is clearance-fitted with the limiting post. The limiting post slides through the guide through hole to limit the lateral and circumferential displacement of the pressure plate, while retaining only its vertical adjustment freedom. The width of the pressure plate is smaller than the opening width of the V-shaped filter rod groove, which provides lateral clearance space for the lateral rejection of unqualified filter rods. The adjusting screw is threaded onto the connecting plate, and the bottom of the adjusting screw is vertically abutted against the upper surface of the pressure plate. By rotating the adjusting screw, the pressure plate can be moved up and down along the guide hole to adjust the vertical gap between the limiting working surface of the pressure plate and the filter rod in the prismatic groove. The compression spring is fitted on the outside of the limiting post, and the two ends of the compression spring abut against the lower surface of the connecting plate and the upper surface of the pressure plate, respectively, to provide a constant pre-tightening downward pressure for the pressure plate, absorb the vibration during the filter rod conveying process, and at the same time provide axial pre-tightening anti-loosening force for the adjusting screw; The set screw is threadedly connected to the connecting plate, and the screw end of the set screw is vertically abutted against the mating surface of the seat, which is used to adjust and lock the relative angle between the connecting plate and the seat, so that the limiting working surface of the pressure plate is parallel to the conveying axis of the filter rod in the prismatic groove. The handle is fixed to the outer surface of the connecting plate and is used to drive the connecting plate to rotate and open around the hinge axis.

[0010] The beneficial effects of this invention are as follows: (1) Completely solve the pain point of easy damage of brush and greatly reduce operation and maintenance costs: The present invention uses a high wear-resistant stainless steel rigid pressure plate with quenching treatment to replace the traditional brush. There is no wear and deformation problem of flexible bristles. After the device is installed once, it can achieve maintenance-free and maintenance-free operation and maintenance. There is no need to frequently replace vulnerable parts, which greatly reduces the cost of spare parts procurement and manual operation and maintenance.

[0011] (2) High adjustment accuracy and convenient operation, ensuring the stability of filter rod conveying: The gap between the pressure plate and the filter rod can be precisely controlled by adjusting the screw, and the parallelism of the working surface of the pressure plate can be ensured by tightening the set screw. There is no need for operators to repeatedly adjust based on experience, which completely solves the problem of difficult adjustment and uncontrollable accuracy of traditional brush gap adjustment; the rigid limit has no constraint capacity decay, which can ensure the stability of filter rod conveying posture for a long time and avoid quality defects such as filter rod jumping, wrinkling, and excessive roundness.

[0012] (3) Significantly improve the effective operating rate of the equipment: The device does not require frequent shutdowns for adjustment or replacement of vulnerable parts. At the same time, it avoids equipment failures and shutdowns caused by filter rod jumping or inability to enter the acceleration wheel, thus significantly improving the continuous running time and effective operating rate of the filter rod forming machine.

[0013] (4) Compatible with the original machine structure and operating logic, with low modification cost: The device is fully compatible with the original machine's mounting holes, requiring no structural modifications to the original machine equipment, and does not interfere with the normal operation of other components of the original machine. At the same time, it is fully compatible with the original machine's filter rod conveying and non-conforming product rejection control logic, and can directly replace the original brush device. The modification cost is low, the adaptability is strong, and it has extremely high promotion and application value.

[0014] (5) Long service life and strong stability: The core components are all made of stainless steel, which ensures the structural strength and wear resistance; the combination structure of the limit post and the guide through hole completely avoids the slippage and deflection of the pressure plate under high-speed vibration conditions; the pre-tightening buffer design of the compression spring, the parallelism locking design of the set screw, and the anti-loosening design of the adjusting screw locking shim avoid the failure of adjustment accuracy caused by equipment vibration and opening and closing collisions, and the service life of the device is several times longer than that of traditional brushes. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the exploded structure of the device of the present invention; Figure 2 This is a schematic diagram illustrating the application effect of the present invention.

[0017] Explanation of reference numerals in the attached diagram: 1-seat, 2-hinge shaft, 3-connecting plate, 4-pressure plate, 5-adjusting screw, 6-compression spring, 7-set screw, 8-handle, 9-fastening bolt, 10-limiting post, 11-locking nut. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] In the following embodiments, the filter rod forming machine is a core equipment for filter rod production commonly used in the tobacco industry. Its prismatic groove (also known as prismatic rail) is a filter rod conveying component between the cutter head cutting mechanism and the acceleration wheel. The mounting hole of the original machine's matching brush device is a standard size used in the industry. The device of the present invention is fully compatible with this mounting interface, requiring no modification to the original machine structure and not interfering with the normal operation of other components.

[0020] Example 1 Reference Figure 1 The filter rod conveying stabilizing device for the prismatic groove of the filter rod forming machine described in this embodiment includes a base 1, a hinge shaft 2, a connecting plate 3, a pressure plate 4, an adjusting screw 5, a compression spring 6, a set screw 7, and a handle 8. The whole adopts a hinged opening and closing structure and is fixedly installed above the original machine mounting position of the prismatic groove of the filter rod forming machine by fastening bolts 9.

[0021] The base 1 serves as the mounting base for the entire device. It is made of stainless steel and has a rectangular structure with dimensions of 25mm in height, 185mm in length, and 15mm in width. The base 1 has threaded through holes that perfectly match the mounting holes of the original brush in the prismatic groove of the filter rod forming machine. Four sets of M4 fastening bolts 9 are used to vertically fix the base 1 to the side mounting surface of the prismatic groove. A 6mm diameter hinge through hole is located at the top of the base 1, with the center of the hinge through hole 32mm from the bottom of the base 1, for mounting the hinge shaft 2.

[0022] The hinge shaft 2 is the hinged rotating component of the device. It is made of stainless steel and is a cylindrical pin with a length of 43mm and a diameter of 6mm. One end of the shaft is machined with a 4mm wide anti-rotation plane. The hinge shaft 2 is inserted laterally into the hinge through hole of the seat 1 and the connecting plate 3 to achieve the hinge engagement between the seat 1 and the connecting plate 3, allowing the connecting plate 3 to rotate and open around the axis of the hinge shaft 2 from 0° to 90°. The anti-rotation plane of the hinge shaft 2 is engaged by a set screw to restrict the circumferential rotation of the hinge shaft 2. Shoulders and elastic retaining rings are provided at both ends of the hinge shaft 2 to restrict the axial movement of the hinge shaft 2 and ensure the stability of the connecting plate 3 during rotation.

[0023] The connecting plate 3 is the core adjustment carrier of the device. It is made of stainless steel and is a plate-shaped structure with a length of 214mm and a thickness of 10mm. The distance from its rotation center (the center of the hinge through hole) to the front surface of the connecting plate 3 is 34mm. The rear end of the connecting plate 3 has a hinge through hole that matches the hinge shaft 2 and is hinged to the seat 1. The front part of the connecting plate 3 has two sets of M6 threaded through holes symmetrically opened along its length for installing adjusting screws 5. An M6 threaded adjusting hole is opened at the mating position between the connecting plate 3 and the seat 1. The set screw 7 is threadedly connected to the threaded adjusting hole, and its screw end is perpendicularly abutted against the mating surface of the seat 1 to adjust and lock the relative angle between the connecting plate 3 and the seat 1.

[0024] The pressure plate 4 is the core working component for limiting the filter rods. It is a rectangular strip with a length of 300mm, a height of 14mm, and a width of 10mm. The straightness tolerance of its working surface (lower surface) is no greater than 0.02mm to ensure uniform contact with the filter rods. The pressure plate 4 is arranged parallel to the V-shaped filter rod groove of the prismatic groove, with its working surface facing the V-shaped filter rod groove of the prismatic groove, together forming a limiting and conveying channel for the filter rods. The V-shaped filter rod groove limits the horizontal displacement of the filter rods, and the limiting working surface of the pressure plate 4 limits the vertical movement of the filter rods. The width of the pressure plate 4 is smaller than the opening width of the V-shaped filter rod groove of the prismatic groove, providing lateral clearance space for the horizontal rejection of unqualified filter rods, and is fully compatible with the original high-pressure air rejection logic. The filter rod inlet end of the pressure plate 4 (the end closest to the cutter head) is machined with a 5° guide angle tilting upwards towards the filter rod. The guide section is 10mm long, which facilitates the smooth entry of the cut filter rod into the limiting channel, avoiding end collisions and wrinkling. Two cylindrical limiting posts 10 are vertically arranged on the upper surface of the pressure plate 4. The connecting plate 3 has guide through holes that correspond one-to-one with the limiting posts 10 and are clearance-fitted. The limiting posts 10 slide through the corresponding guide through holes to limit the lateral and circumferential displacement of the pressure plate 4, retaining only its vertical adjustment freedom.

[0025] The adjusting screw 5 is an adjustment component for the gap between the pressure plates. It is an M6 socket head cap screw of the same specification as the original brush device, with a total screw length of 60mm and a matching nut. The adjusting screw 5 is threaded into the M6 ​​threaded through hole of the connecting plate 3, and its bottom is vertically engaged with the positioning countersunk hole on the upper surface of the pressure plate 4 to prevent the engagement position from shifting. By rotating the adjusting screw 5 clockwise or counterclockwise, the extension length of the screw under the connecting plate 3 is changed, which drives the pressure plate 4 to move up and down along the guide through hole, precisely adjusting the vertical gap between the working surface of the pressure plate 4 and the upper surface of the filter rod in the prismatic groove. In this embodiment, the optimal gap for a φ7.8mm filter rod is 0.15mm. Optionally, a retaining ring (not shown in the attached figure) is fitted on the screw of the adjusting screw 5, so that the retaining ring is located on the upper surface of the connecting plate 3, which is used to limit the axial movement of the adjusting screw 5 and prevent the screw from coming out. This structure is an optional auxiliary structure and does not affect the realization of the core function of the device. A locking washer is provided between the screw head of the adjusting screw 5 and the upper surface of the connecting plate 3, which is used to help limit the loosening of the adjusting screw 5 after the gap adjustment is completed, and avoid gap changes caused by equipment vibration.

[0026] The compression spring 6 is a pre-tightening buffer component made of stainless steel spring wire. Two sets are set corresponding to the two limiting posts 10, respectively fitted on the outside of each limiting post 10, located between the lower surface of the connecting plate 3 and the upper surface of the pressure plate 4. The free height of the compression spring 6 is 8mm, and the working compression is 3~5mm. Its core function is to provide a uniform and constant pre-tightening downward pressure for the pressure plate 4 throughout its entire length, continuously absorbing the vibration generated during the high-speed conveying of the filter rod, and ensuring the stability of the limiting gap of the pressure plate 4. At the same time, through the axial reaction force, the threads of the adjusting screw 5 and the threads of the connecting plate 3 are always kept in single-sided contact, providing axial pre-tightening and anti-loosening force for the adjusting screw 5. This ensures that the adjusting screw 5 will not loosen or rotate freely under the vibration conditions of the high-speed operation of the filter rod forming machine, avoiding unexpected changes in the limiting gap of the pressure plate 4, and improving the accuracy and stability of the device during long-term operation.

[0027] The set screw 7 is a parallelism adjustment and locking component, using an M6 internal hexagon set screw, which is threadedly connected to the threaded adjustment hole on the connecting plate 3. The end of its screw is perpendicular to the mating surface of the base 1. By tightening the set screw 7, the rotation angle of the connecting plate 3 around the hinge shaft 2 can be finely adjusted through the threaded feed, so that the working surface of the pressure plate 4 is completely parallel to the conveying axis of the filter rod in the prismatic groove, with a parallelism tolerance of no more than 0.02mm / 100mm. After adjustment, the set screw 7 is locked by the locking nut 11 to prevent deformation and positional deviation of parts caused by long-term opening and closing and collision of the device, to compensate for the machining error of the parts, and to extend the service life of the device.

[0028] The handle 8 is the operating component of the device. It is made of 3mm thick stainless steel plate and is fixed to the middle of the outer surface of the connecting plate 3 by welding. It provides the operator with a gripping position for opening and closing the device. It has a simple structure and is easy to operate.

[0029] The assembly and debugging steps of the device described in this embodiment are as follows: First, insert the hinge shaft 2 into the hinge through hole of the seat 1 and the connecting plate 3, install the anti-rotation set screw to restrict the circumferential rotation of the hinge shaft, and install elastic retaining rings at both ends of the hinge shaft to restrict axial movement, thus completing the hinge assembly; weld and fix the handle 8 to the connecting plate 3; insert the limit post 10 on the pressure plate 4 into the guide through hole of the connecting plate 3, and install the compression spring 6 on the outside of each limit post 10; screw the two sets of adjusting screws 5 into the threaded through hole of the connecting plate 3 respectively, so that the bottom of the screw is embedded in the positioning countersunk hole on the upper surface of the pressure plate 4, and install the locking washer between the screw head of the adjusting screw 5 and the upper surface of the connecting plate 3, thus completing the pre-assembly of the pressure plate 4 and the connecting plate 3; screw the set screw 7 into the threaded adjustment hole of the connecting plate 3, thus completing the pre-assembly of the overall device.

[0030] Afterwards, remove the original brush device above the prism groove of the filter rod forming machine, and fix the seat 1 of the pre-installed device to the original machine installation position by fastening bolt 9 to ensure that the device is installed firmly and does not interfere with the normal operation of other components such as the original machine cutter head and acceleration wheel.

[0031] Finally, rotate the connecting plate 3 around the hinge shaft 2 to move the pressure plate 4 directly above the filter rod groove of the prismatic groove, and close the device; place the standard φ7.8mm measuring rod into the filter rod groove of the prismatic groove, and tighten the adjusting screw 5 to adjust the gap between the working surface of the pressure plate 4 and the measuring rod to 0.15mm, ensuring that the measuring rod can slide smoothly axially without jamming or obvious movement; tighten the set screw 7 to adjust the parallelism between the working surface of the pressure plate 4 and the axis of the measuring rod, ensuring that the gap is uniform throughout the entire length; first, tighten the locking nut 11 of the set screw 7 to complete the parallelism fixation; then check the gap between the pressure plate 4 and the measuring rod, and after confirming that it is correct, tighten the nut of the adjusting screw 5 and press the locking shim to complete the gap locking, and finally complete the overall debugging.

[0032] Reference Figure 2 The working process of the device described in this embodiment is as follows: During normal production, the fixed-length filter rods, after being cut by the cutter head cutting mechanism, are conveyed axially along the V-shaped filter rod groove of the prismatic groove at a linear speed of 400m / min. The filter rods smoothly enter the limiting channel formed by the pressure plate 4 and the prismatic groove through the 5° guide angle at the inlet end of the pressure plate 4. The rigid working surface of the pressure plate 4 restricts the vertical movement of the filter rods from above, and the V-shaped groove of the prismatic groove restricts the horizontal displacement of the filter rods, so that the filter rods maintain a stable coaxial posture and are accurately and smoothly fed into the rear acceleration wheel, completely avoiding the problems of filter rod jumping and unstable posture causing failure to enter the acceleration wheel and equipment shutdown.

[0033] When the equipment detection system identifies a defective filter rod, the original high-pressure rejection air circuit is activated. The high-pressure airflow is blown laterally from the rejection hole of the prismatic groove and acts on the defective filter rod. The pressure plate 4 of this device is a continuous rigid plane, without the obstruction and constraint of the original brush bristles. At the same time, the width of the pressure plate 4 is smaller than the width of the V-shaped filter rod groove opening, which reserves lateral rejection space for defective filter rods. Under the action of the high-pressure airflow, the defective filter rods can be directly discharged laterally from the lateral gap between the pressure plate 4 and the prismatic groove. The rejection process is unobstructed, fully compatible with the existing rejection control logic of the original machine, and will not cause bending or wear to the device itself. It completely solves the problem of bristle deformation and wear during the rejection process of the original brush.

[0034] When the equipment needs maintenance or cleaning of the prismatic groove, the operator holds the handle 8 and rotates the connecting plate 3 upwards by 90° around the hinge shaft 2 to quickly open the device and fully expose the internal space of the prismatic groove. The operation is convenient. After maintenance, the connecting plate 3 is closed, and normal production can be quickly restored without the need to readjust the gap and parallelism.

[0035] Example 2 This embodiment is an optimized implementation method for high wear resistance and long service life. It optimizes the wear resistance and vibration resistance of the device for the high-load working condition of the filter rod forming machine in continuous 24-hour production. All other unmentioned structures and connection relationships are the same as in Embodiment 1.

[0036] In this embodiment, the front end of the seat 1 is provided with a closing limiting surface. When the connecting plate 3 is rotated to the 0° closed position, the lower surface of the connecting plate 3 is in contact with the closing limiting surface, so as to achieve precise limiting of the closed position of the pressure plate 4 and avoid excessive pressure of the pressure plate 4.

[0037] In this embodiment, the working surface (lower surface) of the pressure plate 4 is coated with a 0.1mm thick chromium nitride wear-resistant self-lubricating coating with a hardness of not less than HV1200, which further improves the wear resistance and self-lubricating performance of the pressure plate 4, avoids scratching of the filter rod forming paper during long-term operation, and extends the service life of the pressure plate 4. The upper surface of the pressure plate 4 and the top contact position of the adjusting screw 5 are machined with a positioning countersunk hole with a diameter of 8mm. The bottom of the adjusting screw 5 is embedded in the countersunk hole. With the help of the limiting post 10 on the pressure plate 4 and the guide through hole structure of the connecting plate 3, the lateral displacement and circumferential deflection of the pressure plate 4 caused by equipment vibration are completely avoided, further improving the operational stability.

[0038] In this embodiment, the base 1, connecting plate 3, and pressure plate 4 are all made of 2Cr13 martensitic stainless steel. After precipitation hardening heat treatment, the structural strength and fatigue resistance are further improved, which is suitable for the use requirements of high-load continuous production. After the device is installed once, the maintenance-free period is no less than 12 months, which greatly reduces the workload of equipment operation and maintenance.

[0039] The device described in this embodiment retains all the advantages of Embodiment 1, and further improves the operational stability and service life under high load conditions, making it particularly suitable for the needs of cigarette factories with large-scale and continuous production.

[0040] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A filter rod conveying stabilizing device for a prism groove filter rod forming machine, comprising a seat (1) fixed above the prism groove of the filter rod forming machine, characterized in that: It also includes a hinge (2), a connecting plate (3), a pressure plate (4), an adjusting screw (5), a compression spring (6), a set screw (7), and a handle (8); The rear end of the connecting plate (3) is hinged to the seat (1) via the hinge shaft (2), and the connecting plate (3) can rotate and open around the axis of the hinge shaft (2). The pressure plate (4) is arranged parallel to the filter rod groove of the prismatic groove. The lower surface of the pressure plate (4) is a limiting working surface that cooperates with the filter rod. The filter rod inlet end of the pressure plate (4) is machined with a guide angle that tilts upward toward the filter rod. The upper surface of the pressure plate (4) is provided with a limiting post (10) vertically. The connecting plate (3) is provided with a guide through hole that is clearance-fitted with the limiting post (10). The limiting post (10) slides through the guide through hole to limit the lateral and circumferential displacement of the pressure plate (4) and only retains its vertical adjustment freedom. The width of the pressure plate (4) is smaller than the opening width of the V-shaped filter rod groove, which provides lateral clearance space for the lateral rejection of unqualified filter rods. The adjusting screw (5) is threadedly connected to the connecting plate (3). The bottom of the screw of the adjusting screw (5) is vertically abutted against the upper surface of the pressure plate (4). By rotating the adjusting screw (5), the pressure plate (4) can be driven to move up and down along the mating direction of the limiting post (10) and the guide through hole, so as to adjust the vertical gap between the limiting working surface of the pressure plate (4) and the filter rod in the prismatic groove. The compression spring (6) is fitted on the outside of the limiting post (10). The two ends of the compression spring (6) abut against the lower surface of the connecting plate (3) and the upper surface of the pressure plate (4) respectively. It is used to provide constant pre-tightening downward pressure to the pressure plate (4), absorb transmission vibration, and at the same time provide axial pre-tightening anti-loosening force to the adjusting screw (5). The set screw (7) is threadedly connected to the connecting plate (3). The screw end of the set screw (7) is vertically abutted against the mating surface of the seat (1) to adjust and lock the relative angle between the connecting plate (3) and the seat (1), so that the limiting working surface of the pressure plate (4) is parallel to the conveying axis of the filter rod in the prismatic groove. The handle (8) is fixed to the outer surface of the connecting plate (3) and is used to drive the connecting plate (3) to rotate and open around the hinge axis (2).

2. The filter rod forming machine prism groove filter rod conveying stabilizing device according to claim 1, characterized in that: The upper part of the seat (1) is provided with a hinge through hole, and the rear end of the connecting plate (3) is provided with a mating through hole coaxial with the hinge through hole. The hinge shaft (2) is transversely inserted into the hinge through hole and the mating through hole to realize the hinge connection between the seat (1) and the connecting plate (3).

3. The filter rod forming machine prism groove filter rod conveying stabilizing device according to claim 2, characterized in that: The hinge shaft (2) has an anti-rotation plane on its shaft body. The circumferential rotation of the hinge shaft (2) is restricted by the anti-rotation plane being engaged with the set screw. Shoulders and elastic retaining rings are provided at both ends of the hinge shaft (2) to restrict the axial movement of the hinge shaft (2).

4. The filter rod forming machine prism groove filter rod conveying stabilizing device according to claim 1, characterized in that: The connecting plate (3) has two sets of threaded through holes symmetrically opened along its length direction. The adjusting screws (5) are provided in two sets, and the two sets of adjusting screws (5) are threaded into the corresponding threaded through holes. Each set of adjusting screws (5) is matched with the compression spring (6).

5. The filter rod forming machine prism groove filter rod conveying stabilizing device according to claim 1 or 4, characterized in that: A locking washer is provided between the screw head of the adjusting screw (5) and the upper surface of the connecting plate (3) to help limit the loosening of the adjusting screw (5).

6. The filter rod forming machine prism groove filter rod conveying stabilizing device according to claim 1, characterized in that: The set screw (7) is fitted with a locking nut (11), which is used to lock the set screw (7) after the angle adjustment is completed.

7. The filter rod forming machine prism groove filter rod conveying stabilizing device according to claim 1, characterized in that: The handle (8) adopts a bent structure and is fixed to the outer surface of the connecting plate (3) by welding.

8. The filter rod forming machine prism groove filter rod conveying stabilizing device according to claim 1, characterized in that: The guide angle of the pressure plate (4) is 3°~8°, and the width of the pressure plate (4) is 70%~90% of the opening width of the V-shaped filter rod groove.

9. The filter rod forming machine prism groove filter rod conveying stabilizing device according to claim 1, characterized in that, The limiting working surface of the pressure plate (4) is sprayed with a wear-resistant self-lubricating coating. The upper surface of the pressure plate (4) and the top contact position of the adjusting screw (5) are machined with a positioning countersunk hole. The bottom of the adjusting screw (5) is embedded in the positioning countersunk hole.

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